I2S loopback working!

soundcube-i2s-test/soundcube-i2s-test.ino

@@ -39,7 +39,12 @@ void cw(unsigned char first, unsigned char second){
   Serial.print(" ");
   Serial.print(second, HEX);
   Serial.print(" : ");
-  Serial.println(result);
+  if(result == 0) {
+    Serial.println("OK");
+  } else {
+    Serial.print("ERROR: ");
+    Serial.println(result);
+  }
   delay(5);
 }
 
@@ -50,13 +55,16 @@ void cr(unsigned char first, size_t len){
 
    Wire1.requestFrom(0x18, len, true); // request bytes from register XY
    
+   Serial.print(first, HEX);
+   Serial.print(" ");
+
    byte buff[len];    
    Wire1.readBytes(buff, len);
    for (int i = 0; i < len; i++) {
-     Serial.println(buff[i], HEX);
+     Serial.print(buff[i], HEX);
+     Serial.print(" ");
+     Serial.println(buff[i], BIN);
    }
-   Serial.println();
-
 }
 
 void setup() {
@@ -73,7 +81,7 @@ void setup() {
   delay(100);
 
   pinMode(19, OUTPUT); // MCLK enable
-  digitalWrite(19, LOW); // enable MCLK
+  digitalWrite(19, HIGH); // enable MCLK
 
   pinMode(20, OUTPUT); // CODEC reset
   digitalWrite(20, HIGH);
@@ -117,57 +125,69 @@ void setup() {
   cw(0x13, 0x82); // MADC 2
   cw(0x14, 0x80); // OSR ADC 128
   cw(0x3d, 0x01); // ADC PRB_R1
-  cw(0x3d, 0x00); // ADC PTM_R4
-  cw(0x51, 0b11000000); // power up ADC
-  cw(0x52, 0b00000000); // unmute ADC
 
-  // ADC VOLUME 0b1101000 = -12dB, 0b00000000 = 0dB, 0b0101000 = +20dB
+  cw(0x00, 0x01); // select page 1
-  cw(0x53, 0b00000000); // LEFT
+  cw(0x3d, 0b01100100); // ADC PTM_R3
-  cw(0x54, 0b00000000); // RIGHT
 
   // DAC
   cw(0x00, 0x00); // select page 0
-  //cw(0x01, 0x01); // software reset
   cw(0x0b, 0x81); // NDAC 1
   cw(0x0c, 0x82); // MDAC 2
   cw(0x0d, 0x00); // OSR DAC 128
   cw(0x0e, 0x80); // OSR DAC 128
-  cw(0x1b, 0x10); // world length 20bits PTM_P4 (highest performance)
+  cw(0x1b, 0b00000000); // word length 16bits
   cw(0x3c, 0x08); // PRB_P8
 
   cw(0x00, 0x01); // select page 1
-  //cw(0x01, 0x08); // disable internal crude avdd
-  //cw(0x02, 0x01); // enable AVdd LDO
   cw(0x7b, 0x01); // set REF charging time to 40ms
   //cw(0x14, 0x25); // set HP soft stepping for anti pop
   //cw(0x0a, 0x0B); // set input CM to 0.9V and LO to 1.65V
   
   // ROUTING
-  cw(0x00, 0x01);
+  cw(0x00, 0x01); // select page 1
   cw(0x0e, 0b00001000); // left DAC reconstruction filter routed to LOL
   cw(0x0f, 0b00001000); // right DAC reconstruction filter routed to LOR
-  cw(0x03, 0x00); // DAC PTM_P3/4
+  cw(0x03, 0b00000100); // DAC PTM_P3/4
-  cw(0x04, 0x00); // DAC PTM_P3/4
+  cw(0x04, 0b00000100); // DAC PTM_P3/4
 
   // LO GAIN
   cw(0x00, 0x01);
   cw(0x12, 0b00000010); // LOL gain 0dB
   cw(0x13, 0b00000010); // LOR gain 0dB
 
+  // POWER UP
+  // ADC
   cw(0x00, 0x00); // select page 0
+  cw(0x51, 0b11000000); // power up ADC
+  cw(0x52, 0b00000000); // unmute ADC
   cw(0x3f, 0b11010100); // power up and route left digital audio to left dac channel and right to right
   cw(0x40, 0x00); // unmute DAC digital volume
 
   // DAC VOLUME 0b00000000 = 0dB, 10000001 = -63.5dB, 0b00110000 = +24dB
+  cw(0x00, 0x00); // select page 0
   cw(0x41, 0b00000000); // LEFT 
   cw(0x42, 0b00000000); // RIGHT
   
+  // ADC VOLUME 0b1101000 = -12dB, 0b00000000 = 0dB, 0b0101000 = +20dB
+  cw(0x00, 0x00); // select page 0
+  cw(0x53, 0b00000000); // LEFT
+  cw(0x54, 0b00000000); // RIGHT
+
+  // STATUS FLAGS
+  Serial.println("CODEC STATUS");
+  cw(0x00, 0x00); // select page 0
+  Serial.println("ADC Flags");
+  cr(0x24, 1);
+  Serial.println("DAC Flags");
+  cr(0x25, 1);
+  Serial.println("P0_42 - Sticky Flags");
+  cr(0x2A, 1);
 
   //i2s.onTransmit(codec_transmit);
   //i2s.onReceive(codec_receive);
 
-  i2s.setDOUT(14);
+  i2s.setDOUT(15);
-  i2s.setDIN(15);
+  i2s.setDIN(14);
   i2s.setBCLK(16); // Note: LRCLK = BCLK + 1
   i2s.setMCLK(18);
   i2s.setMCLKmult(256); // 12.288.000Hz
@@ -175,7 +195,7 @@ void setup() {
   i2s.swapClocks();
   i2s.setBitsPerSample(16);
 
-  i2s.setBuffers(6, SIZE * sizeof(int16_t) / sizeof(uint32_t));
+  //i2s.setBuffers(6, SIZE * sizeof(int16_t) / sizeof(uint32_t));
 
   if(!i2s.begin(48000)){
     Serial.println("I2S error!");
@@ -183,11 +203,39 @@ void setup() {
   }
 
 }
-
+int32_t last = 0;
+int frame = 0;
 void loop() {
-  //Serial.println(volume);
-  //delay(10);
   int16_t l, r;
   i2s.read16(&l, &r);
+
+  // float sine_pos = (2.0f * M_PI * 1000.0f * (float)frame) / (float)48000;
+  // l = (int16_t)(sin(sine_pos) * 8192.0f);
+  // r = l;
+
   i2s.write16(l, r);
+
+  // volume += l + r;
+  // if(millis() - last > 1000){
+  //   Serial.println(volume);
+  //   volume = 0;
+  //   last = millis();
+
+  //   // STATUS FLAGS
+  //   Serial.println("CODEC STATUS");
+  //   cw(0x00, 0x00); // select page 0
+  //   Serial.println("ADC Flags");
+  //   cr(0x24, 1);
+  //   Serial.println("DAC Flags");
+  //   cr(0x25, 1);
+  //   Serial.println("P0_42 - Sticky Flags");
+  //   cr(0x2A, 1);
+  //   Serial.println("P0_43 - Interrupt Flags");
+  //   cr(0x2B, 1);
+  //   Serial.println("P0_44 - Sticky Flags");
+  //   cr(0x2C, 1);
+
+  // }
+  frame++;
+  if(frame == 48000) frame = 0;
 }